Re: [PATCH] mac80211: fix possible deadlock in TX path

From: Erik Stromdahl
Date: Wed May 01 2019 - 07:07:07 EST

On 4/30/19 9:49 AM, Toke HÃiland-JÃrgensen wrote:
Erik Stromdahl <erik.stromdahl@xxxxxxxxx> writes:

This patch fixes a possible deadlock when updating the TX statistics
(when calling into ieee80211_tx_stats()) from ieee80211_tx_dequeue().

So is this the fix for the issue with TX scheduling you reported
earlier? :)

Actually not. I thought so initially, but then, after a few more test runs,
I was able to run into the issue again.

But it does seem to fix the other issue with the RCU stall since I haven't
seen it with this patch applied (could be just a coincidence though).